Roller for fireproof blinds or curtains.



0. 9 1 0r 3 N. A .J D E T N E T A P D. U 0 L C o M E ...m 7. 6. 0N. 0 1 oo nm N ROLLER FOR FIREPROOP BLINDS 0RV CURTAINS.

APPLIUATIOF FILED HOV.1l. 1904. BENEWED NOVJG, 1905.

NITED STATES PATENT onirica.

EDWARD H. 'MCCLOUD,

or coLUMBUs,`oHIo.

ROLLERlFOR FIREPROOF BLINDS OR QUFTAINS.

Specification of LettersY Patent.

Patented Jan. 30, 1906.

To all whom, t may concern:

Be it known that LEDWARD H. McCLoUn, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Rollers for Fireproof Blinds or Curtains; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention, while intended more particularly for use in connection with -rollers for flreproof curtains or blinds, can be used inother situations., v

The object of the invention is to do away with the long coiled springs heretofore deemed necessary in such rollers, and consequently lessen the cost of construction of the rollers.

The present invention is a species of what I have claimed', broadly, in an application for patent led concurrently herewith and it consists in the construction hereinafter described and claimed.

In the accompanying drawings, illustrating one embodiment of the invention, Figure l is a vertical sectional view taken longitudinally of the curtain-roller. Fig. 2 is an end view looking at the hoisting mechanism.

The curtain-roller 1 has an axial shaft 2, supported at one end in a bracket 3 and on the other end a loose sleeve 2, that turns in and is supported in the bearing of a bracket 3a. The drum of the roller is supported at one end by the loose sleevev 2a and at the other by the head 2b, pinned to the shaft 2. On the shaft 2, at one side of the bracket and within the drum, is a fixed collar 2C, and between this and the loose sleeve 2il is secured a short coil-spring 4, so that by moving the loose sleeve with respect to the shaft tension may be given to and taken from the spring. The means for moving the loose sleeve and shaft with respect to each other are located on the opposite side of the bracket and comprises a gear 5, keyed on the outer end of the loose sleeve, a larger gear 6, keyed on the outer end of the shaft, and pinions 7 and 8, engaging the gears 5 and 6, respectively, and

turning together. be the larger.

When the invention is used in connection with a curtain-roller, the gears 7 and 8 are preferably turned by means of a sprocketwheel 9, fixed to the gears and turned by a chain' 10. The curtain, which is attached to the drum, is designated 11.

The operation is as follows: Upon turning the sprocket 9 in the direction indicated by the arrow, Fig. 2, the curtain is wound up and the tension of the spring relaxed. By turning the sprocket in the opposite direction tension is imparted to the spring. It is because of the difference in the rates of speed at which the sleeve and the shaft are turned 'that the spring is tightened or relaxed. As the curtain is unrolled the spring is gradually tightened `and exerts its tension on the shaft through the gear 5, the pinions 7 and 8 and gear 6 thus counterbalancing or partly counterbalancing the curtain and making the operation thereof easy.

What I claim, and desire to secure by Letters Patent, is-

1. Ink combination with a bracket or bearing, a loose sleeve turning in said bearing, a

, winding-shaft turning in said sleeve, a spring connecting the winding-shaft and sleeve at one side of said bracket or bearing, and gears fast on the sleeve and shaft on the opposite side of said bracket or bearing, and means for imparting a diHerential motion to the sleeve and shaft.

2. In combination with a bracket or bearing, a loose sleeve turning in said bearing, a winding-shaft turning in said sleeve, a spring connecting the winding-shaft and sleeve at The pinion 7 is shown to one side of said bracket or bearing, and gears shaft, and pinionsv to engage, said ears and motion to s ad shaft and sleeve at different turn them at different rates of spee. rates of speed. s 1o 4. In combination With a breket or beary 1n testimony whereof I affix my signature ing, a loose sleeveturning n said bearing, .a in presence of two Witnesses.

Winding-shaft turning in said sleeve, a spring EDWARD H. MCCLOUD.

connecting the Winding-sheftand slge'eye and Witnesses; m

gears fast on the sleeve and shaft, and 'pn- U. R, PETERS,

ions to engage said gears adapted to impart GEORGE M. FINCKEL. 

